摘要
多路径效应是探测低空巡航导弹所必须面临的困难之一。在建立经典多路径模型的基础上,推导了低空目标的反射波与直达波矢量叠加后的归一化场强,定义了反映多路径条件下合成场强起伏的场强波动因子。基于巡航导弹近似等地面高度飞行的事实,结合场强波动因子和反射波相对直达波的总相移之间的关系,推导出多路径条件下影响雷达探测低空巡航导弹的主要因素,并通过仿真计算,分析了各因素对巡航导弹探测的影响,得出克服多路径效应影响应采取的措施。
Multi path effect is one of the difficulties in low altitude cruise missile detection. Based on the classical reflection model for low-altitude target, normalized field-strength due to the vector summation of indirect reflected echoes and direct target echoes is deduced and the field-strength fluctuating factor which reflects fluctuation of compound field-strength in multi-path is defined in this paper. Based on the fact of cruise missile equal flying height and combined with the function of the field strength fluctuating factor and the phase shift between indirect reflected echoes and direct target echoes, the primary parameters influencing low-altitude cruise missile detection are deduced in multi-path, then the influence of each parameter on low-altitude cruise missile detection is analyzed via simulation. The measures to overcome the influence induced by multi-path are presented.
出处
《雷达科学与技术》
2010年第1期7-10,14,共5页
Radar Science and Technology
关键词
多路径效应
低空目标
巡航导弹
场强
multi path effect
low altitude target
cruise missile
field-strength
